use axis function to adjust limits r axis from minimum value of r to the maximum value of r in matlab

You can use the axis function in MATLAB to adjust the limits of the R-axis. To set the minimum and maximum limits of the R-axis to the minimum and maximum values of R, you can use the min() and max() functions, respectively. Here's an example:

main.m
% Example data
R = [1 2 3 4 5];
theta = [pi/4 pi/3 pi/2 2*pi/3 3*pi/4];
X = R.*cos(theta);
Y = R.*sin(theta);

% Plot the data
plot(X, Y);

% Adjust the limits of the R-axis
rMin = min(R);  % minimum value of R
rMax = max(R);  % maximum value of R
axis([rMin rMax -rMax rMax]);  % [xmin xmax ymin ymax]
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In the example above, we first define some example data R, theta, X, and Y. We then plot the data using plot(X, Y). Finally, we adjust the limits of the R-axis using axis([rMin rMax -rMax rMax]), where rMin is the minimum value of R and rMax is the maximum value of R. The second and third elements in the array specify the limits of the theta-axis (in this example, we set it to -rMax and rMax, respectively).